In a multithreaded build, cause abuild to prepend each line
of output (normal or error) with an indicator of the build
item that was responsible for producing it. Starting in
abuild version 1.1.3, this is the default for multithreaded
builds. For additional details, see Chapter 20, Controlling and Processing Abuild's Output.

--output-prefix=prefix

Prepend the given prefix string to every line of non-error
output generated by abuild and to every line written to
standard output by any program abuild invokes. See also
--error-prefix. For additional details, see
Chapter 20, Controlling and Processing Abuild's Output.

--raw-output

Prevent abuild from doing any kind of capture or filtering
of the output produced by any item's build. This option also
makes abuild's standard input available to any program that
abuild invokes. This is the default for single-threaded
builds and was the behavior for all builds prior to abuild
version 1.1.3. For additional details, see Chapter 20, Controlling and Processing Abuild's Output.

--silent

Suppress most non-error output. Also tells the backend build
tools to generate less output.

--verbose

Generate more verbose output. Also tells the backend build
tools to generate more output.